Vat dyestuffs.



toninrnn erm ne PATENT oration.

WILHELM BAUER, 01F VOI-IWINKEL, AND ALFRED HERRE AND RUDOLF MAYER, 0F ELBEJRFEIJD; GERMANY, ASSIGNORS TO FARBENFABRIKEN VORM. FRIEDR. BAYER & 00., 0F ELBERFELD, GERMANY, A CORPORATION OF GERMANY.

VAT DYE-STUJEFS.

No Drawing.

Specification of Letters JPatent.

Patented June 30, 1914..

- the alpha-keto group-is replaced by easily movable or replaceable substituents, e. g. halogen, sulfur the amino group, the alkoXy group) with components such as are in use for the production of indigoid dyes e. 9., l-chloro-l-naphthol, alpha-anthrol, oxythionaphthene, 5.7-dibromoindoxyl, oxy- ,anthranol, carbazol, etc.

The new dyes are after being dried and pulverized dark powders soluble in concentrated sulfuric acid generally with a bluish to green coloration and dyeing cotton from the hydrosulfite vat from red to blue to green fast shades. They have most probably the following general formula:

It being a halogenated naphthalene ring,

are produced by treating alpha-alpha-dihalogen beta-hydrocyanocarbo dinaphthylimid of the formula graphically represented:

with anhydrous aluminium chlorid and by saponifying the resulting intermediate proclucts.

In order to illustrate the new process more fully the following examples are given, the parts being by weight:

Example 1: 230 parts of l-chloro-2.3- naphthisatin (M. P. 258259 C.) are converted into the alpha-chlorid on being heated to 110 C. with 240 parts of lPCl and 5000 parts of chlorobenzene. The mixture thus obtained is poured while still warm into a solution which is well stirred of 240 parts of alpha-anthrol in chlorobenzene. The dye which separates on cooling is filtered ofi', washed and dried. Yield 90 per cent. of the theory. It is a greenish-blue crystalline powder soluble in hot nitrobenzone with a pure greenish-blue and in concentrated sulfuric acid with a greenish color haxiing most probably the following formu a:

QM Y YT k/\ By treatment with hydrosulfite and NaOH a reddish-brown vat results from which cotton can be dyed in shades changing on exposure to air into a pure fast greenish-blue. Instead of the alpha-chlorid mentioned other chlorids can be used 6. g. the alphachlorid of bromo-1-chloro-2.3-naphthisatin.

Example 2: 341 parts of chloro-l-chloro- I ON 2.8-naphthisatin-alpha-anilid (obtained by the action of anilin on chloro-l-chloro-2.3- naphthisatin-alpha-chlorid (black needles M. P. 200 C.) and 250 parts of alphaanthrol are suspended in 7000 parts of acetic acid anhydrid and the mixture is heated to 100 C. for 1 hour while the mixture is being well stirred. The dye is filtered off,

washed and dried. It is a. blue crystalline powder showing a metallic luster, soluble in hot nitrobenzene with a greenish-blue and in concentrated sulfuric acid with a greenish-blue coloration. It dies cotton from the vat in greenish-blue shades.

In the following table the properties of some of the new dyestuffs are given Solution in- Dyestufi obtained frompp Cement ated on dh t dn r Ntm'benzem sulfuric acid.

Chloro 1 -eh1oro -2. 3 -naphthisatin -cl1lo- Gray-blue crystalline powder... Blue Blue Dark blue. 7

rid+4-chloro-1-naphtho1.

Bromo- 1 -chloro-2.3 -naphthisatin chlo- Gray-blue crystalline powder Blue I Blue Greenlsh-blue.

rid+ 4-chloro-1-naphthol.

Chloro 1 chloro- 2.3 naphthisatin chlo- Blue-violet needles Blue Blue Pure blue.

rid+oxythionaphthene.

Chloro 1 chloro 2.3 -naphthisatin chlo- Dark blue powder with a cupric luster Blue Blue Greenish-blue.

rid+5.7-dibromoindoxyl.

Chlcro 1 chloro 2.3 naphthisatin chlo- Gray-green powder. Bluish-green. Olive-green. Green.

rid+4-methoxy-1-anthro1.

Chloro 1 -.chlor0 2.3 naphthisatin ani- Greenish black needles with a cupric Bluish-green Blue Green.

lid+oxyanthranoL luster.

Chloro 1 chloro 2.3 naphthisatin chlo- Bordeaux-redneedles Fuchsin-red.. Violet-blue Bordeaux-red.

rid+carbazole.

Bromo -1 ohloro -2.3 naphthisatin chlo- Bordeaux-red needles Fuchsin-red.. Violet-blue Red-violet.

rid+carbazo1e.

We claim 1. The new vat dyestuffs being derived from 2.3-naphthisatins, which are after being dried and pulverized dark owders soluble in concentrated sulfuric ac1d with a bluish to green coloration, having most probably the following general formula:

in which R represents an alpha-chlor-naph thalene nucleus and R the nucleus of an mdigoid dyestufl' component; and dyeing cotton from the hydrosulfite vat from red to blue to green fast shades, substantially as described.

3. The new vat dyestufi's being derived from 2.3-naphthisatins, which are after being dried and pulverized dark powders soluble inconcentrated sulfuric acid with a bluish to green coloration, having most probably the following general formula:

C=R' R ICO in which R represents a chlor substituted naphthalene nucleus and R the nucleus of an indigoid d estufi component; and dyeing cotton from t e hydrosulfite vat from red to blue to green fast shades, substantially as described. I

4:. The new vat dyestufis being derived from 2.3-naphthisatins, which are after being dried and pulverized dark powders solu ble in concentrated sulfuric acid with a bluish to green coloration, having most probably the following general formula:

NH c=R' do in which R represents a naphthalene nucleus containing halogen and R the nucleus of an indigoid component of the anthracene series and dyeing cotton from the hydrosulfite vat from red to blue to green fast shades, substantially as described.

5(The new vat dyestuffs being derived from 2.3-naphthisatins, which are after being dried and pulverized dark powders soluble in concentrated sulfuric acid with a bluish to green coloration, having most probably the following general formula:

in which R represents an alpha-chlor-naphthalene nucleus and R the nucleus of an indigoid dyestufi' component of the ant-hracene series and dyeing cotton from the hydrosulfite vat from red to blue to green fast shades substantially as described.

6. The new vat dye being the condensation product of l-chloro'2.3-naphthisatin and alpha-anthrol having most probably the formula:

being after being dried and pulverized a greenish-blue crystalline powder soluble in hot nitrobenzene with a pure greenislrblue and in concentrated sulfuric acid with a greenish color; yielding after treatment with hydrosulfite and NaOH a reddishbrown vat from which cotton is dyed in shades changing on exposure to air into a pure fast greenish-blue, substantially as described.

In testimony whereof we have hereunto set our hands in the presence of two subscribing witnesses.

WILHELM BAUER. ALFRED HERRE. RUDOLF MAYER.

Witnesses HELEN NUFER, ALBERT NUFER.

[L. s.] [L. s.] [L. s.]

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

